Gorini F, Santoro M, Pierini A, Mezzasalma L, Baldacci S, Bargagli E, Boncristiano A, Brunetto MR, Cameli P, Cappelli F, Castaman G, Coco B, Donati MA, Guerrini R, Linari S, Murro V, Olivotto I, Parronchi P, Pochiero F, Rossi O, Scappini B, Sodi A, Vannucchi AM, and Coi A
Background: Orphan drugs are used for the diagnosis, prevention and treatment of rare diseases that, in the European Union, are defined as disorders affecting no more than 5 persons in 10,000. So far, a total of around 800 orphan medicinal products have been approved by the European Medicines Agency, however the utilization profile of orphan drugs has yet to be explored. This study aimed at assessing the utilization profile of orphan drugs authorized for marketing by the Italian Medicines Agency using population-based data. Methods: A total of 21 orphan drugs used in outpatient settings, approved in the European Union before or during the 2008-2018 period and involving 15 rare diseases, were included in the study. The monitored population included patients with one of the conditions surveilled by the population-based Tuscany Registry of Rare Diseases and diagnosed between 2000-2018. A multi-database approach was applied, by linking data from the registry with information collected in drug prescriptions databases. The prevalence and intensity of use were estimated for the selected orphan drugs and other non-orphan medications, used to treat the same rare disease and for which a change in the prevalence of use was hypothesized after authorization of the orphan drug. Results: For some diseases (acquired aplastic anemia, tuberous sclerosis complex, most metabolic diseases) a low prevalence of orphan drugs use was observed (range between 1.1-12.5%). Conversely, orphan drugs were frequently used in hemophilia B, Wilson disease and idiopathic pulmonary fibrosis (maximum of 78.3, 47.6 and 41.8%, respectively). For hemophilia B and Leber's hereditary optic neuropathy, there are currently no other medications used in clinical practice in addition to orphan drugs. Six orphan drugs were used for the treatment of pulmonary arterial hypertension, appearing the elective therapy for this disease, albeit with different utilization profiles (range of prevalence 1.7-55.6%). Conclusion: To the best of our knowledge, this is the first study investigating the utilization profile of orphan drugs prescribed in a defined geographical area, and providing relevant information to monitor over time potential changes in the prevalence of these medications as well as in the health care decision making., Competing Interests: RG reports a relationship with Tuscany Region that includes: funding grants. RG reports a relationship with Fondazione Cassa di Risparmio di Firenze that includes: funding grants. RG reports a relationship with Italian Ministry of Health that includes: funding grants. RG reports a relationship with Zogenix that includes: consulting or advisory, speaking and lecture fees, and travel reimbursement. RG reports a relationship with Biocodex that includes: speaking and lecture fees and travel reimbursement. PC reports a relationship with GSK SRL that includes: speaking and lecture fees. PC reports a relationship with AstraZeneca SpA that includes: speaking and lecture fees. GC reports a relationship with SOBI that includes: funding grants. GC reports a relationship with CSL Behring Spa that includes: funding grants. GC reports a relationship with Roche that includes: board membership, consulting or advisory, and speaking and lecture fees. GC reports a relationship with Bayer that includes: board membership and speaking and lecture fees. GC reports a relationship with CSL Berhing that includes: board membership and speaking and lecture fees. GC reports a relationship with Biomarin that includes: board membership and speaking and lecture fees. GC reports a relationship with Sanofi that includes: board membership and speaking and lecture fees. GC reports a relationship with Novo Nordisk that includes: board membership and speaking and lecture fees. GC reports a relationship with Takeda that includes: board membership and speaking and lecture fees. GC reports a relationship with Kedrion that includes: board membership and speaking and lecture fees. GC reports a relationship with LFB that includes: board membership and speaking and lecture fees. GC reports a relationship with Grifols that includes: board membership and speaking and lecture fees. GC reports a relationship with UniQure Inc. that includes: board membership and speaking and lecture fees. PP reports a relationship with GSK that includes: speaking and lecture fees. PP reports a relationship with LEOPharma that includes: speaking and lecture fees. FC reports a relationship with Pfizer that includes: consulting or advisory. FC reports a relationship with Alnylam that includes: consulting or advisory. FC reports a relationship with Akcea that includes: consulting or advisory. BS reports a relationship with Jazz that includes: speaking and lecture fees. BS reports a relationship with Pfizer that includes: board membership and speaking and lecture fees. BS reports a relationship with Novartis that includes: speaking and lecture fees. BS reports a relationship with Ariad that includes: speaking and lecture fees. BS reports a relationship with Amgen that includes: board membership and travel reimbursement. BS reports a relationship with Sanofi that includes: travel reimbursement. IO reports a relationship with Amicus that includes: consulting or advisory and funding grants. IO reports a relationship with Genzyme that includes: consulting or advisory and funding grants. IO reports a relationship with Menarini International that includes: funding grants. IO reports a relationship with BMS that includes: board membership, consulting or advisory, and funding grants. IO reports a relationship with Cytokinetics Inc. that includes: board membership, consulting or advisory, and funding grants. IO reports a relationship with Bayer that includes: funding grants and speaking and lecture fees. IO reports a relationship with Boston Scientific that includes: funding grants and speaking and lecture fees. IO reports a relationship with Tenaya that includes: consulting or advisory. SL reports a relationship with Takeda that includes: consulting or advisory, funding grants, and speaking and lecture fees. SL reports a relationship with Sanofi Genzyme that includes: consulting or advisory, funding grants, speaking and lecture fees, and travel reimbursement. SL reports a relationship with SOBI that includes: funding grants, speaking and lecture fees, and travel reimbursement. SL reports a relationship with CLS-Behring that includes: funding grants and speaking and lecture fees. SL reports a relationship with NovoNordisk that includes: funding grants and speaking and lecture fees. SL reports a relationship with Roche that includes: consulting or advisory, funding grants, speaking and lecture fees, and travel reimbursement. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. FP report a relationship with Biomarin International Limit that includes: board membership and speaking and lecture fees. FP report a relationship with Vitaflo that includes: travel reimbursement., (Copyright © 2022 Gorini, Santoro, Pierini, Mezzasalma, Baldacci, Bargagli, Boncristiano, Brunetto, Cameli, Cappelli, Castaman, Coco, Donati, Guerrini, Linari, Murro, Olivotto, Parronchi, Pochiero, Rossi, Scappini, Sodi, Vannucchi and Coi.)